Q.

The equations of four circles are (x±a)2+(y±a)2=a2 The radius of a circle touching all the four circles is

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a

(2+2)a

b

22a

c

(2+1)a

d

(2+2)a

answer is C.

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Detailed Solution

The four circle are as shown in the figure.The smallest circle touching all of them has radius 2a-aand the greatest circle touching all of them has radius 2a+a
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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